Charcoal and Total Carbon in Soils from Foothills Shrublands to Subalpine Forests in the Colorado Front Range

Forests

Christopher Licata¹ 

[1] Department of Biological Sciences, University of Denver, 2190 East Iliff Ave., Denver, CO 80208, USA

关键词: charcoal;    black carbon;    fire;    forests;    soil organic carbon;    Rocky Mountains;    fire regime;   

DOI  :  10.3390/f3040944

来源: mdpi

【 摘 要 】

Temperate conifer forests in the Colorado Front Range are fire-adapted ecosystems where wildland fires leave a legacy in the form of char and charcoal. Long-term soil charcoal C (CC) pools result from the combined effects of wildland fires, aboveground biomass characteristics and soil transfer mechanisms. We measured CC pools in surface soils (0–10 cm) at mid-slope positions on east facing aspects in five continuous foothills shrubland and conifer forest types. We found a significant statistical effect of vegetation type on CC pools along this ecological gradient, but not a linear pattern increasing with elevation gain. There is a weak bimodal pattern of CC gain with elevation between foothills shrublands (1.2 mg CC ha⁻¹) and the lower montane, ponderosa pine (1.5 mg CC ha⁻¹) and Douglas-fir (1.5 mg CC ha⁻¹) forest types prior to a mid-elevation decline in upper montane lodgepole pine forests (1.2 mg CC ha⁻¹) before increasing again in the spruce/subalpine fir forests (1.5 mg CC ha⁻¹). We propose that CC forms and accumulates via unique ecological conditions such as fire regime. The range of soil CC amounts and ratios of CC to total SOC are comparable to but lower than other regional estimates.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.